Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b919a8fef49f30…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 11:40:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a914eb9251f100b0e2c1ee16158ef7a6 SHA-1: 59a1f1d5c27c6a3584ae0a41c7d774902f51b8d2 SHA-256: 54b919a8fef49f30fd71f87f12841164da6bdeeda11ab1414978e02db5bc9f46
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to server installation, likely serving as a lure. The PDF_SEO_LINK_FARM heuristic suggests this PDF is part of a larger link farm designed to attract traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=how+to+install+apache+tomcat+8+on+ubuntu+14.04+via+apt-get
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/kinibos.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/back_exercises_csp.pdf
    • https://cdn.shopify.com/s/files/1/0440/4455/0294/files/body_dysmorphic_disorder_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/geisinger_commonwealth_school_of_medicine_mission.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/42350194038.pdf
    • https://cdn.shopify.com/s/files/1/0436/4845/0718/files/kiluvoxovadug.pdf
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/2831433965.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/fukoponubowasiwogiverafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7548/5339/files/zijugaginafivovosovekozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/32142364458.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006086.bin
4cd73ad62c1d3f72807b0c8a620abc728f07c134291377abfcf2a2032f0c8c95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6086 6044 bytes
font_01_sfnt_off00007514.bin
5cb5947665864de88151c65707dd6ddcb634d297be053693079d7e920c6b254a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7514 14680 bytes

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